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How to Replace Window Panes

A damaged window pane could cause a lot of trouble. This could be an opportunity to upgrade your windows to energy efficient or insulated ones to enjoy benefits like increased comfort, increased resale value and reduced utility bills.

It's a task you can take on yourself for only a fraction of the cost of hiring an expert. You'll need only the right tools and a few minutes of your time.

Glass

Replace your old single-paned windows with tempered or insulated glass to increase energy efficiency, reduce noise, and preserve the historical integrity of your older home. The process of replacing windows is easy and can be completed by homeowners with basic hand tools. In addition to a replacement pane, the following items are required: latex glazing putty; Glazier's points; pliers and an electric heater to warm the old putty if required. Before starting, put on gloves and safety glasses as working with broken glass can cause injuries.

Take away any broken glass pieces remaining. This is best accomplished with a pair of pliers, however, Window Replacement Panes a flathead screwdriver may be used in a pinch. Make use of a wood chisel or putty knife to get rid of any old putty that remains around the frame and the window sash. Work slowly and carefully and be careful not to damage the old window sash. This is best done on a ladder, not the ground. Also, ensure that someone on the ground to ensure it is held steady.

After you have removed all the old putty, you can prepare the window frame to accommodate the new pane. To allow for seasonal expansion or contraction, subtract 1/8 inch each from the measurements of width and height. These measurements can be sent to a hardware or home center store to get a piece cut of stock glass to the right size. You can also cut the glass yourself if have the tools you need.

After putting in the new glass Apply caulking around the edge. This will make the glass weatherproof. Install a glazier's pointing on both sides of the frame. This will ensure the pane. The points shouldn't be so tight that they create friction between the frame and the sash However, they should not be loose.

Before applying the putty to the surface, gently knead it until it is smooth and free of lumps. Then, roll it into pencil-size strips. Place the first strip to the corner of the frame, working from one corner to the other to ensure it is even and smooth.

Glazier's Points

The glazier's points are small triangular pieces of metal which help to secure the glass into the window frame without causing damage to the delicate surface. Knowing how to use these little helpers is easy and could save you money on professional installation or the cost of purchasing new glass.

Once the old putty and the glazier's point are gone, thoroughly clean the frame with a utility knife to remove any remaining residue. If necessary you can lightly sand the wood along rabbet grooves to smooth rough spots. If you sand wood, protect it with painter’s tape to avoid accidental damage.

Write down the dimensions of the frame. Bring these measurements to an hardware store or home center, and have the new pane cut smaller than the frame's opening. This will ensure that the pane fits perfectly and allows for expansion and contraction.

Place the new pane in the frame and press it in place with your hand. Then, use the tip of your chisel, or the back end of the putty knife to make a tap on the glazier's points as illustrated in Figure 11. The glazier's points should sit in line with the top edge of your pane and the shoulders should be just below the lip.

Apply a thin bead of glazing compound on the edges of the new glass and in the rabbet grooves to seal and protect them. Allow it to dry and cure completely.

After the glazing compound dries and the glazing compound is dry, Window replacement panes you can install the new window sash. First, coat the wood with a thick layer of linseed. This will prevent the new putty from taking up the moisture and drying out and cracking over time. Apply this coat using a brush or the edge of your putty knife, and then use the chisel, or the back end of the knife to gently press the new sash and glazier's points into the rabbet grooves. Repeat this process every 10 inches around the perimeter of the frame.

Putty

A baseball that is thrown, an errant rock or a fallen branch can cause a window replacement panes (click through the next page) to break or crack. Fortunately, the majority of windows can be easily replaced by simply putting a new piece in the proper place. The glass is held in place by small clips made of metal called the glazier's pointed and putty, which is often called glazing compound. Before installing a replacement pane, first remove the old one and clean up the area with the help of a rag, an abrasive scraper that is a pull type or an abrasive wood chisel. Wear gloves and safety glasses while working. If the window is secured to the frame, you'll have to use a heat gun to soften the adhesive prior to prying it free.

If you're planning to install the original sash in the future, take care to remove the molding pieces that secure the old pane. Then you can sand the sash down to ensure it's smooth and ready for new caulk. After the sash has been re-installed, apply a new silicone caulk around the glass replacement windows to ensure it won't leak or discolor in time.

Take the glazing points out of the rabbets, the grooves in the sash where the glass is. If they're difficult to work out, try placing an instrument like a heat gun to soften them before you do. If you're using a heat gun, make sure not to damage the railings or sash by placing the tool too close.

Once the old points of glazing and putty have been removed, prepare a bed for the new pane. Roll a rope of glazing compound between your hands, and form it to be about 1/2-inch thick. Then, push it into the rabbets in which the glass will rest. It is crucial that the glass rests against the putty in all places on both sides So if you have to do so, gently tap the glass into the rabbet with your thumb.

If the new pane is cracked you can fill it with a solvent-based glass glue or silicone caulk before pressing it into the sash. In other cases, you'll need to putty over the crack to form an airtight seal and keep water out. Once the putty is dry clean the oily film off of the glass and let it dry completely before you paint. If you paint before the putty is fully dry, it won't form a strong seal and may leak or discolor in time.

Paint

You may be concerned about replacing a broken piece of glass. But the truth is that replacing a single glass pane doesn't need to cost a fortune if you do it yourself. In fact, even a double-pane window can be replaced at only a fraction of the cost of an expert.

First, if you are working on a large window, make sure it is securely attached to the frame. Using the proper tools and techniques you can make this task relatively easy and quick.

When you are ready to begin taking down the old window pane. Take out the metal glazing points attached to it. These are essentially small metal triangles which function as "nails" that hold the window in place in the wood frame. They are buried beneath a layer of glazing putty that hardens into a solid, formed wedge that secures the window in place and hides the edges.

After you have removed the old pane taken away clean the surrounding frame and wood. Scrape away any paint and sand down the rabbet grooves, where the glazing points were. Sand them down to clean wooden surfaces so you can paint the frames the same shade. After sanding, apply a layer of flax oil to the wood's surface to extend the life of the frame.

The next step is to measure the dimensions of the window's opening. You will need to measure the vertical and horizontal dimensions of the entire opening as well as the thickness. Subtract 1/8 inch from each measurement to ensure you get the exact measurement for the new pane. This will allow for seasonal changes in the glass. Bring these measurements to your local hardware or home improvement store, and they will have the glass cut for you.

Now, it's time to bed the new window pane. To do this, place the pane inside the frame and move it around until a 1/16 inch of putty remains between the edge of the glass and the sash on all four sides. Use a putty knife to smear the putty evenly, making sure that there isn't an excessive amount of excess putty in the corners and along the edges. When the putty dries, it can be painted with the same color as the frame to prevent water and air from leaking into the frame and causing fogging.